<template>
  <div :class="{fullscreen:fullscreen}" class="tinymce-container" :style="{width:containerWidth}">
    <textarea :id="tinymceId" class="tinymce-textarea" />
    <div class="editor-custom-btn-container">
      <el-upload
        v-if="uploadApiUrl"
        class="upload-demo"
        :action="uploadApiUrl"
        :headers="uploadHeader"
        :name="uploadFieldName"
        :show-file-list="false"
        :on-success="uploadSuccess"
        :on-error="uploadError"
        multiple
      >
        <el-button icon="el-icon-upload" size="mini" type="primary">
          上传图片/视频
        </el-button>
      </el-upload>
    </div>
  </div>
</template>

<script>
/**
 * docs:
 * https://panjiachen.github.io/vue-element-admin-site/feature/component/rich-editor.html#tinymce
 */
import plugins from './plugins'
import toolbar from './toolbar'
import load from './dynamicLoadScript'

// why use this cdn, detail see https://github.com/PanJiaChen/tinymce-all-in-one
const tinymceCDN = 'https://cdn.jsdelivr.net/npm/tinymce-all-in-one@4.9.3/tinymce.min.js'

export default {
  name: 'Tinymce',
  components: { },
  props: {
    id: {
      type: String,
      default: function() {
        return 'vue-tinymce-' + +new Date() + ((Math.random() * 1000).toFixed(0) + '')
      }
    },
    value: {
      type: String,
      default: ''
    },
    toolbar: {
      type: [Array,Boolean],
      required: false,
      default() {
        return []
      }
    },
    menubar: {
      type: [String,Boolean],
      default: 'file edit insert view format table'
    },
    height: {
      type: [Number, String],
      required: false,
      default: 360
    },
    width: {
      type: [Number, String],
      required: false,
      default: 'auto'
    },
    uploadApiUrl: {
      type: String,
      default() {
        return ''
      },
    },
    uploadHeader: {
      type: Object,
      default() {
        return null;
      }
    },
    uploadFieldName: {
      type: String,
      default() {
        return 'image';
      },
    },
    readonly:{
      type: Boolean,
      default() {
        return false;
      },
    },
    backgroundColor:{
      type:String,
      default(){
        return '';
      },
    }
  },
  data() {
    return {
      hasChange: false,
      hasInit: false,
      tinymceId: this.id,
      fullscreen: false,
      languageTypeList: {
        'en': 'en',
        'zh': 'zh_CN',
        'es': 'es_MX',
        'ja': 'ja'
      },
    }
  },
  computed: {
    containerWidth() {
      const width = this.width
      if (/^[\d]+(\.[\d]+)?$/.test(width)) { // matches `100`, `'100'`
        return `${width}px`
      }
      return width
    }
  },
  watch: {
    value(val) {
      if (!this.hasChange && this.hasInit) {
        this.$nextTick(() => {
          const editor = window.tinymce.get(this.tinymceId)
          editor.setContent(val || '')
        })

      }
    },
    hasChange(val) {
      if (val) {
        this.addProhibitBack();
      } else {
        this.removeProhibitBack();
      }
    },
  },
  mounted() {
    this.init();

    // 设置后退时弹出窗口
    // history.pushState(null, null, document.URL);
    /*window.addEventListener("popstate", () => {
      history.pushState(null, null, document.URL);

    });*/
    // this.addProhibitBack();

  },
  activated() {
    if (window.tinymce) {
      this.initTinymce()
    }
  },
  deactivated() {
    this.destroyTinymce()
  },
  destroyed() {
    this.destroyTinymce()
    this.removeProhibitBack();
  },
  methods: {
    // 禁止后退
    prohibitBack() {
      history.pushState(null, null, document.URL);
      this.$errorMessage('文章尚未保存');
    },
    // 添加禁止后退事件
    addProhibitBack() {
      return;
      // console.log('add')
      // history.pushState(null, null, document.URL);
      // window.addEventListener("popstate", this.prohibitBack);
    },
    // 移除禁止后退事件
    removeProhibitBack() {
      return;
      // console.log('remove')
      // window.removeEventListener("popstate", this.prohibitBack);
    },
    init() {
      // dynamic load tinymce from cdn
      load(tinymceCDN, (err) => {
        if (err) {
          this.$message.error(err.message)
          return
        }
        this.initTinymce()
      })
    },
    initTinymce() {
      const _this = this
      window.tinymce.baseURL = 'https://cdn.jsdelivr.net/npm/tinymce-all-in-one@4.9.3';
      let toolbarInit = toolbar
      if(typeof this.toolbar === 'boolean'){
        toolbarInit = this.toolbar
      }else{
        toolbarInit = this.toolbar.length > 0 ? this.toolbar : toolbar
      }

      window.tinymce.init({
        remove_script_host: true,
        relative_urls : true,
        // document_base_url : "https://cdn.jsdelivr.net/npm/tinymce-all-in-one@4.9.3/",
        selector: `#${this.tinymceId}`,
        language: this.languageTypeList['zh'],
        height: this.height,
        body_class: 'panel-body ',
        object_resizing: false,
        toolbar: toolbarInit,
        menubar: this.menubar,
        readonly: this.readonly,
        plugins: plugins,
        end_container_on_empty_block: true,
        powerpaste_word_import: 'clean',
        code_dialog_height: 450,
        code_dialog_width: 1000,
        advlist_bullet_styles: 'square',
        advlist_number_styles: 'default',
        imagetools_cors_hosts: ['www.tinymce.com', 'codepen.io'],
        default_link_target: '_blank',
        link_title: false,
        // 修改字体
        fontsize_formats: "8px 10px 12px 14px 18px 24px 36px",
        // 添加样式
        content_style: "p {margin:0 0 20px;word-break: break-word;line-height: 1.8;padding: 0;}",
        nonbreaking_force_tab: true, // inserting nonbreaking space &nbsp; need Nonbreaking Space Plugin
        init_instance_callback: editor => {
          if (_this.value) {
            editor.setContent(_this.value)
          }
          _this.hasInit = true
          editor.on('NodeChange Change KeyUp SetContent', () => {
            this.hasChange = true
            this.$emit('input', editor.getContent())
          })
          if(this.backgroundColor){
            editor.getBody().style.backgroundColor = this.backgroundColor;
          }
        },
        setup(editor) {
          editor.on('FullscreenStateChanged', (e) => {
            _this.fullscreen = e.state
          })
        },
        // it will try to keep these URLs intact
        // https://www.tiny.cloud/docs-3x/reference/configuration/Configuration3x@convert_urls/
        // https://stackoverflow.com/questions/5196205/disable-tinymce-absolute-to-relative-url-conversions
        convert_urls: false
        // 整合七牛上传
        // images_dataimg_filter(img) {
        //   setTimeout(() => {
        //     const $image = $(img);
        //     $image.removeAttr('width');
        //     $image.removeAttr('height');
        //     if ($image[0].height && $image[0].width) {
        //       $image.attr('data-wscntype', 'image');
        //       $image.attr('data-wscnh', $image[0].height);
        //       $image.attr('data-wscnw', $image[0].width);
        //       $image.addClass('wscnph');
        //     }
        //   }, 0);
        //   return img
        // },
        // images_upload_handler(blobInfo, success, failure, progress) {
        //   progress(0);
        //   const token = _this.$store.getters.token;
        //   getToken(token).then(response => {
        //     const url = response.data.qiniu_url;
        //     const formData = new FormData();
        //     formData.append('token', response.data.qiniu_token);
        //     formData.append('key', response.data.qiniu_key);
        //     formData.append('file', blobInfo.blob(), url);
        //     upload(formData).then(() => {
        //       success(url);
        //       progress(100);
        //     })
        //   }).catch(err => {
        //     failure('出现未知问题，刷新页面，或者联系程序员')
        //     console.log(err);
        //   });
        // },
      })

    },
    destroyTinymce() {
      const tinymce = window.tinymce.get(this.tinymceId)
      if (this.fullscreen) {
        tinymce.execCommand('mceFullScreen')
      }

      if (tinymce) {
        tinymce.destroy()
      }
    },
    setContent(value) {
      window.tinymce.get(this.tinymceId).setContent(value)
    },
    getContent() {
      window.tinymce.get(this.tinymceId).getContent()
    },
    uploadSuccess(res, file, fileList) {
      if (res.error === 0) {
        let fileExtension = res.info.imageUrl.split('.').pop().toLowerCase()
        let ele = '';
        if (fileExtension === 'mp4') {
          ele = `<video controls autoplay><source src="${res.info.imageUrl}"></video>`;
        } else {
          ele = `<img alt="" class="wscnph" src="${res.info.imageUrl}" >`;
        }
        window.tinymce.get(this.tinymceId).insertContent(`<p>${ele}</p>`);
      } else {
        this.$errorMessage(res.message);
      }
    },
    uploadError(err, file, fileList) {
      this.$errorMessage(err);
    },
  }
}
</script>

<style lang="scss" scoped>
.tinymce-container {
  position: relative;
  line-height: normal;
}

.tinymce-container {
  ::v-deep {
    .mce-fullscreen {
      z-index: 10000;
    }
  }
}

.tinymce-textarea {
  visibility: hidden;
  z-index: -1;
}

.editor-custom-btn-container {
  position: absolute;
  right: 4px;
  top: 4px;
  /*z-index: 2005;*/
}

.fullscreen .editor-custom-btn-container {
  z-index: 10000;
  position: fixed;
}

.editor-upload-btn {
  display: inline-block;
}
</style>
